CalculatorA pocket-style immediate-execution calculator on screen: type on your keyboard or tap the keys, chain add-subtract-multiply-divide, use percent and sign toggle, with a friendly divide-by-zero message.Scientific CalculatorAn online scientific calculator with sin cos tan and inverse trig, ln/log logarithms, powers, square root and factorial, plus constants pi and e, with degree-radian mode for students and engineers.Long DivisionEnter dividend and divisor as whole numbers and watch long division replay step by step: each quotient digit, the product subtracted and the running remainder, with 2, 4 or 6 decimal places and recurring-decimal detection.Fraction CalculatorEnter the numerator and denominator of two fractions to add, subtract, multiply and divide them. Results auto-reduce to lowest terms, toggle between improper and mixed numbers, with decimal and percentage shown alongside.Time CalculatorPick two date-times and instantly get the gap in days, hours, minutes and seconds plus total seconds; or add or subtract a duration in days-hours-minutes-seconds to a start moment.World ClockLive clocks for UTC and eight major cities — Beijing, Tokyo, Sydney, Dubai, Paris, London, New York and Los Angeles — plus a UTC-offset converter to compare every city.Percentage CalculatorOne tool for three percent questions: what is p percent of x, what percent x is of y, and the percent change from x to y. Clear formulas and instant results for discounts, shares and growth rates.Date DifferencePick two dates and get the total days, total weeks and a year-month-day combo at once, then add or subtract N days or months from a start date. Leap years handled, great for age and project duration.Loan CalculatorEnter the principal, annual rate and term in months to compare equal installment annuity against equal principal side by side: monthly payment, total interest, total repayment, plus an amortization schedule.
Keep a kind heart, hold integrity as your foundation, and cherish warm love; may the world know peace and humanity live in harmony.
持善良之心，守正直之本，怀温暖之爱；愿世界和平，人间祥和。